<!doctype html>
<meta charset=utf-8>
<title>Test for bug 780993</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
test(function() {
  var select = document.createElement("select");
  var option = document.createElement("option");
  select.appendChild(option);
  assert_equals(select.options[0], option);
  select.options[0] = null;
  assert_equals(option.parentNode, null);
  assert_equals(select.options[0], undefined);
}, "Should be able to set select.options[n] to null.");
test(function() {
  var select = document.createElement("select");
  var option = document.createElement("option");
  var option2 = document.createElement("option");
  select.appendChild(option);
  assert_equals(select.options[0], option);
  select.options[0] = option2;
  assert_equals(option.parentNode, null);
  assert_equals(option2.parentNode, select);
  assert_equals(select.options[0], option2);
}, "Should be able to set select.options[n] to an option element");
test(function() {
  var select = document.createElement("select");
  var option = document.createElement("option");
  select.appendChild(option);
  assert_equals(select.options[0], option);
  assert_throws(null, function() {
    select.options[0] = 42;
  });
  assert_equals(option.parentNode, select);
  assert_equals(select.options[0], option);
}, "Should not be able to set select.options[n] to a primitive.");
</script>
